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  • Treatment Results icon

    Jawline Results
    1-2 Weeks | 4-6 Months

  • Treatment Procedure Time icon

    Procedure Time
    15-20 mins

  • Treatment Risk and Complications icon

    Risk & Complications
    Allergic Reactions, Bruises,
    Swelling, Eyebrow/eyelid dropping

  • Full recovery from treatment icon

    Full Recovery
    No Downtime

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    Back To Work

What Is A Masseter Muscle?

The masseter muscles are a group of muscles that are found back of your jaws. You can easily feel them yourself if you clench your jaws firmly.

With constant work out you give to your masseter muscle, they eventually bulk up, grow in size and become noticeably enlarged.

Too much growth of your chewing muscles also results in wide, boxy jaws in both men and women. Moreover, upon teeth clenching, some patients also complain of headaches, facial pain and sore jaws.

Masseter Botox for Jawline Slimming

While jaw reduction surgery or ‘jaw shaving’ (surgical intervention) was the only and most popular procedure worldwide, especially among the Asian population with square jawline, it also carried many unwanted costly side effects.

Today, Masseter Botox is a very popular treatment that involves a series of injections of Botox (botulinum toxin) in each of your masseter muscle to relax them by blocking the nerve signals. Jaw Botox reduces the size of the masseter muscle.

As soon as Botox kicks in, each of your overactive muscle shrinks, hence, giving a narrower and slimmer appearance of the lower jaws.

Besides jawline slimming, Masseter Muscle Botox also reduces:

  • TMJ (temporomandibular joint dysfunction) symptoms
  • Migraines Botox / tension headaches

Masseter Muscle Botox Procedure

After a successful completion of your consultation at CosmeDocs and an in-depth facial analysis by an aesthetic practitioner, begin your 15-minute jawline reshaping procedure.

It is very important to understand that Jawline Slimming Botox is meant to shrink the size of your enlarged masseter muscle and not the bone structure of your face.

  1. After cleansing, numbing and marking the injection sites, the practitioner will inject Botox in masseter using tiny needles called ‘invisible needle’. The number of units for the treatment varies from patient to patient and is determined by the doctor.
  2. During the procedure, there may be slight discomfort or a ‘pinched feel’ in your skin, but that is all there is to it.
  3. Following the botulinum toxin injection, the doctor gently massages the treated area to help settle the Jaw Botox and to reduce chances of any bruising and swelling.

Botox for Facial Contouring

Botox masseter injections not only helps tapers off the wide lower jaw in the patients but also indirectly helps bring out the ‘hidden contours’ of their faces.

A broad jawline, in men and women, thus, may not allow the cheek bones to reach their full potential. Nevertheless, it is with masseter muscle Botox that facial balance is achieved by enhancing the jaw and cheek area.

Therefore, a correct balance of all the facial features is crucial for an attractive visage regardless of the gender.

Benefits of Masseter Botox Injections

The non-surgical jawline reshaping using Botox (botulinum toxin) has the following impressive cosmetic as well as medical benefits for men and women:

    • Teeth grinding (severe bruxism)
    • Reducing jaw pain & tension
    • Corrects overall jawline asymmetry
    • Relieves headaches
    • Improves TMJ symptoms
    • Contouring wide square jaw
    • Balances the upper and lower face shape
    • Prevents dental damage due to teeth grinding especially at night

Masseter Botox Before and After Results

Jawline Botox results in the masseter reduction resulting into a slimmer and defined lower face shape. A proper examination of the lower face and masseter muscle size determines the frequency and units of Botox injections.

Client Reviews


  • Male £350
  • Female £350

Popular Treatments

Masseter Botox Before and After

Whether men or women, a slimmer, sleeker jawline can make a huge difference. Face slim Botox gives ‘Facial Slimming Effect’ without the need of any crash dieting, heavy workouts and extreme weight loss. As your masseter muscle is relaxed, there is jaw reduction. Hence, your overall face shape looks leaner and youthful.

In Women: Many Asian women with unwanted squared jawline, greatly benefit from Face Slimming Botox and do not have to endure painful surgical experience to achieve a V-shape look.

In Men: Whereas in men, a jawline that is a bit too squarish for their facial features can throw out the facial balance, which is undesirable.

Masseter Treatment Video

Why Choose CosmeDocs?

Aesthetic doctors have vast experience in the field and have carried out thousands of Botox (botulinum toxin) and Dermal Filler procedures over the course of 12 years.

We tailor every treatment approach to achieve aesthetic goals for every patient. Since everyone is beautifully unique. By combining master injection skills, knowledge and our ‘Aesthetic Eye’ we help you to look the best version of yourself.

Time To Flaunt Your New Jawline 

Your new, lifted, sexy jawline is just a booking away. Schedule an appointment at CosmeDocs at your next opportunity.

Causes Of a Wide Face

Enlarged Jaw Masseter Muscle

Masseter muscle enlarges due to excess using chew gum, weightlifting and involuntary nighttime teeth grinding (bruxism). Some individuals also clench their teeth during the day causing jaw pain and migraines. The recommended treatment is, therefore, masseter Botox injection.

Enlarged Mandible Bone

This condition requires surgical correction. Nevertheless, masseter Botox (botulinum toxin injection) may still help even if the masseter muscle is not very large. Some ethnic groups have large mandible bones such as Orientals.

Adipose Tissue (Fat)

Excess adipose maybe the issue. This can dissolved using liposuction or small PDO Threads (not cogs) around the jawline and chin area.

Loose Sagging Skin

With ageing the face volume depletes and skin may sage. Advanced non-surgical skin or face lifting procedures utilise dermal fillers or PDO Threads

Frequently Asked Questions

How long does Botox masseter injections last?

Non-surgical jaw reduction and reshaping with Botox (botulinum toxin) is not permanent. The effects usually last between 3 to 4 months depending on the number of units injected during the procedure.
In general, large masseter muscles need three sessions the first year, two the second year, and then fewer for maintaining results.
Experts at CosmeDocs advise maintenance treatments two to three times a year, especially if it is difficult for you to manage facial pain and headaches due to teeth grinding.

Moreover, you must regularly schedule Botox injections 3 to 6 months apart if you want to keep the jaw-slimming effects by preventing your masseter muscle from returning to its original size.

How much does masseter Botox cost?

For jaw slimming and reshaping, masseter Botox cost UK is £350 per session for male as well as female patients. Moreover, the number of units of Botox injection is tailored for each patient since everyone is different.
Patients who desire more or persistent slimming effects may need to reschedule a follow-up treatment at CosmeDocs will ascertain your Botox face slimming cost. Doctors here will examine and assess the size of your masseter muscle to determine the number of sessions you require.

Am I the right candidate for jaw reduction Botox?

It is the thickness of your masseter muscles or your chewing muscles that helps the injector to determine your eligibility for Masseter Botox. You could be an ideal candidate for this non-surgical procedure if upon biting down firmly or clenching your teeth, the muscle feels nearly rock-hard and visibly bulges out.

Many patients with masseter hypertrophy tend to have similar habits of either teeth grinding at night or too often and too much gum chewing. This persistent activity eventually leads to enlarged masseter muscle. Hence, giving a squarish jawline which is undesirable especially in women.

In such cases, jaw slimming Botox may be a great solution for such patients. Other patients who are most suitable for Botox in masseter are those who:

  • Desire a more balanced and harmonised facial profile
  • Want to reduce jaw pain and tension
  • Need to address their involuntary teeth grinding habit (severe bruxism)
  • Want to have a symmetrical jawline
  • Struggling with TMJ symptoms
  • Suffer from frequent spells of migraine and tension headaches

Is jaw Botox safe?

All the Botox treatments are generally safe, provided that you seek the professional services of a doctor or a cosmetic surgeon who is experienced and well-versed in relevant knowledge.

We ensure that the highest of the industry standards are met and that each patient leaves our clinic happy and satisfied.

However, there are certain side effects of the Botox treatment that you need to be aware of:

  • Slight pain or discomfort
  • Minor bruising, redness and swelling at the injection site
  • Some muscle weakness especially during chewing
  • Dizziness or headaches

You can minimise any discomfort, bruising at the injection site or swelling by gently applying ice pack to the treated areas. You can easily carry out your normal activities after your botulinum toxin injections.

The chances of side effects, such as a crooked smile or a lopsided smile, is less than 0.5%. Other side effects of Botox such as allergic reactions are very rare.

What if I do not like the results?

Jawline filler adds volume to enhance definition. Masseter Botox injections reduce the size of the jaw muscles in a square jaw for face slimming.

What is the aftercare for jawline botox?

Another reason to get jaw Botox from an experienced aesthetic practitioner or a cosmetic surgeon is the provision of aftercare guidelines to the patients. Experts at CosmeDocs advise you to follow the aftercare instructions for better results:

  • Avoid alcohol consumption for at least 3 days after the treatment
  • Do not indulge in any strenuous exercising or hot yoga following your procedure
  • Avoid rubbing or intense facial massages after the Masseter Botox London
  • Do not lie down immediately after your Botox injection to prevent the migration of the product in the nearby areas.
  • Try to remain upright for at least 4-6 hours after the medical treatment.
  • Avoid indulging into any facial after Botox.
  • Stay away from sunbeds after Botox treatment and use an SPF 30 or higher.

Do you offer permanent jawline fillers?

Masseter muscle Botox involves slimming the shape of the outer jawline using Botox, a muscle relaxing injection. Relaxing the jaw muscles causes part of them to shrink.

We creatively weaken certain parts of the jaw muscle sculpting it chemically to enhance your face shape desirably.

In addition to achieving aesthetic results, patients can also expect significant relief from jaw pain and shoulder aches from masseter Botox.

What is the difference between Jawline Botox and Jawline Fillers?

Jawline Botox (botulinum toxin) and Jawline Fillers are non-surgical injectable treatments that are aimed at enhancing your facial profile. The procedures are carried out by an experienced doctor at CosmeDocs after a thorough facial assessment of the patient.

Jaw Botox injection is meant to relax your overactive muscles that are involved in chewing (masseter hypertrophy). It helps to shrink the size of the jaw muscle also known as masseter muscle hypertrophy, in a matter of a few weeks without the need of any surgery.

Jaw Fillers, on the other hand, helps to restore the volume along the jawline where contour and definition has been lost due to age. Many young patients, too, prefer jawline fillers to soften a square appearance and get a non-invasive chiselled facelift in minutes.

Usually, men and women can benefit from both the aesthetic treatments at the same time if they desire to instantly improve their facial balance. However, a prior detailed consultation is crucial before signing up for Botox treatment and non surgical jaw enhancement.

Will I have problems speaking and chewing my food after jaw botox injections?

In a word, no. The non-surgical jaw reduction treatment partially relaxes your masseter muscles, causing them to be less active. As a result, your bulky chewing muscle shrinks (masseter muscle hypertrophy) in just a few weeks. However, after chewing, you may experience slight fatigue around the muscle area, but this is merely a momentary event that will subside, usually within a week.

To conclude, a masseter Botox injection will not affect your speech or eating activity in any way. On the other hand, your unbearable jaw pain is significantly relieved.

Does Jawline Botox Hurt?

Botox in masseter is not all painful for the most patients. The reason behind this is that at CosmeDocs, experts usually use a skin numbing agent before injecting Botox (botulinum toxin) to avoid any possible discomfort.

Moreover, we use very tiny needle during the procedure to minimise any painful experience.
Many patients report a mere pinch or prick during the Botox injections and feel slight soreness immediately after the procedure. Nevertheless, that sensation usually goes away on its own with or without icing the treated areas.

Why CosmeDocs?

CosmeDocs is a renowned name in the industry of cosmetics. Our clinics located in Harley Street (London), Derby, Nottingham, and Portsmouth are well equipped and modern practices. CosmeDocs are also well-known trainers to physicians from around the globe.

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